Core-tube cutter



Se t. 1

p 9 c. J. ROBERTS I CORE TUBE CUTTER Filed July 24. 1925 5 Sheets-Sheet l INVENTOR ATTORNEY Se t'. 192

p 7 c. J. ROBERTS CORE TUBE CUTTER Filed July 24, 1925 5 Sheets-Sheet 2 azfiwa/iy M 4 ATTORNEY Sept. 6,1927. c J ROBERTS 4l.& 66 CORE TUBE CUTTER Filed July 24. 1925 5 Sheets-Sheei y 3 I *a 3 v R l A o o o i? 3 3 A 0 g Q e z A f o o o o o A o 0 5 Q e Z o j Z? 0 0 6 O 6 o o e; v

.(ff/fdf/i INVENTOR ATTORNEY 1 641 866 Sept c. J. ROBERTS coma TUBE CUTTER I 1 v Filed July 24, 1925 5 Sheets-Sheet Se't. 192. 1641866 p 7 c. J. ROBERTS I 001w TUBE CUTTER Filed Ju1.v 24. 1925 s Sheets-Sheet s- INVENTOR ATTORNEY r Patent ed Sept. 6, 1927. i i i v UNITED STATES o PATENT OFFICE. CHESTER J. ROBERTS, MILWAUKEE, WISCONSIN, ASSIGNOR TO NORTHERN PAPER MILLS, F GREEN BAY, WISCONSIN.

oonE-ruBE Curran.

Application filed July 24, 1925. Serial No. 45,914.

This invention relates to means for cut- Figure is a detail sectional view through ting cardboard or other tubing into sections, one of the cutter carrying arms, and has for its object the provision of a Figure dis a detail view, novel machine designed primarily to be Figure 7 is a'section on the line 7+7 of 5-used in connection with a spiral core tube Fig. 2,

making machine and driven thereby Where: Figure 8 is a detail view of a guide, by toautomatically cut the tube into any Figure 9 is a detail view of one of the number of sections of desired length. cutter disk supports.

It is well known in the art that the usual Referring more particularly to the draw- 10 mechanism for cutting such tube. involves ings, the letter A designates a portion of a the use of a'circular rotary sawwhich has machine used in the making of spiral tubthe great disadvantageof leaving the cut ing such as that indicated by the letter B. tube with ragged edges which must be The diameter and exact manufacture of the dressed off by a subsequent operation, this tubingform no part of the present inven 15 disadvantage resulting in a great loss of tion as my'device is capable of use in con tim'e,'the servicesof one or more additional nection with tubing of different sizes; Only operators, and also a waste in the material. a portion ofthe tube making machine is il- It is with the above facts in view that I lustrated, as it likewise forms no part of have designed the present machine which the present invention.

2 embodies the use. of rotary disk cutters In connection with the machine A, I pro- Whi h ar driven by he rotary; movement 'vide a supportingshaft 10 which extends imparted to the spiral tube itself, means 196- within the tubing B and which is driven ing provided for app1ying pressure to the by any suitable means, not shown, whereby cutting disks so that they will sever'the to impart comparatively rapid rotary move- 2 tube. I w ment to the tube after it leaves the machine.

A more specific object is the provision of In constructing my device, I make use of a machine of this character which is ada supporting structure including a base 12 8O justable whereby it may be used for cutting from which rise uprights 13 which support 7 the tube lIltO sections 0f different lengths plate members 14 constituting a. platform or 30' depending upon the useto which the sections table having a longitudinal opening or slotare to be put. I 15 at the sides of whichare mounted chan- The invention further contemplates the neled guides 16 having flaring ends 16* and provision of various details of construction which are designed to have a cam action in and arrangement which will insure proper a manner which will be described hereinand speedy operation of the mechanism. after. One upright 13' atone side of the An additional object is the provision of device is'p'rovided with a "bearing 17 within a cutting machine of this type which will which'is journaled the drive shaft 18 which becomparatively simple and inexpensive in may be driven by any desired means, not

manufacture, eas to control, positive in acshown. On the shaft 18 is a bevel gear 21 4 tion, efiicient an durable in service, and a for a purpose to be described.

general improvement in the art. c 7 Journaled through the uprights 13 and With the above andother objects and ad arranged in spaced parallel relation are vantages in view, the invention consists in transverse shafts 22 and 23, the former of the details of construction to be hereinafter which carries abevel gear 24 meshing with 45 more specifically described and claimed, and the gear 21st) that the movement of the illustrated in the accompanying drawings, drive shaft willbe'imparted to one of the in which: i V I transverse shafts. Secured on the shafts 22 Figure 1. is a side elevation of the comand 23 are sprockets 25 of a suitable type plete machine showing it associated with a designed to drive a roller chain 26 which is 50 portion ofa spiral tube making machine." preferably of the Morse or Whitney type.

Figure 2 is an end View of mydevice, v By adjustably mounting the uprights 13 up- "Figure 3 is alongitudinal section, on the base 12-it is ap arent-that they may Figure 4is adetail crosssection, 1, be moved closer toget er orfarther apart so as to permit the use of chains of different len grths, it such should be desired tor any reason. though this feature is not illustrated as it; is an obvious expedient.

Pivotally mounted upon the chains 26 at spaced points are pairs of arms :28 normally urged apart by springs 29. The arms are provided with lugs 19 which ride within the guide 16 for forcing the arms together.

The free ends of the arms 28 are formed with bearings 30 within which are journaled shafts 31 carrying cutting disks 32 of any preferred type and size. The shaft 10 car rying the tube B is so arranged as to extend longitudinally of my device above the table or platform 1% thereof and in position to be engaged by the pairs ot disks 32 which are carried and moved by the chain at the same speed with which the tube is ted to the device from the manufacturing machine. In the operation it will be seen that the chain 26 moves by virtue of the rotation of the sprocket 25 driven l. the shaft 18, the lugs 19 on the successive parts o't pivoted arms 28 are brought into engagement with inclined inner surfaces of the guide members 16 which operate to force the arms of each pair toward each other so that they will engage the tube B. As the tube B is rotated with the driven shaft 10, it is apparent that the engagement of the tube with the cutting disks will impart rotary movement to the latter while they are being pressed into engagement with the tube by the inclined wedge member. The resultis that the pairs of disks will operate to cut the tube B into sections oil any desired length depending upon the distance between the successive pairs of disks. Owing to the fact thatthe shaft 10 extends through and supports the tube, it is quite obvious that it forms a substantial hearing which will prevent the formation of jagged or ragged edges when the sections of the tube are severed. In this way, it is quite apparent that there will be no roughness which will need to be removed by a subsequent operation as is true in the ordinary method of cutting the tube. As soon as the arms 98 pass by the inclined wedge members 16, it is quite evident that the springs 29 will operate to force the arms apart so that the disks carried thereby will be out o't engagement with the tube.

From the foregoing description and a study of the drawings it will be apparentthat .l have thus provided a simple machine which will very efficiently operate to out a tube of chip or straw board or in fact any other similar material into uniform sections of any desired length suitable for use, as cores for rolls of paper of any kind, mailing tubes, cylindrical shells, cereal boxes and the like. A great advantage is the leaving of an absolutely smooth surface or edge at both ends of each section cut off so that the appearance will be neat and finished. It is not necessary that all the pairs of disks be the same distance apart as they might be differently spaced in order that sections of different length may be cut by the one machine. It is desired, however, the arms might be mounted upon the supporting chain 26 that they could be adjusted dilterent distances apart for varying the length of the cut sections. It is also to be observed that it makes no difference what the diameter of the tube may be as the operating wedges might be shifted away from the slot so as to decrease the throw of the pivoted arms in case it is desired to cut tubes of relatively large diameter.

While I have shown and described the preferred embodiment of the invention, it is of course to be understood that I reserve the right to make such changes in the form, cmistruction and arrangement of parts as will not. depart from the spirit of the invent onor the scope of the subjoined claims.

Having thus described my invention, I claim 1. In a. core tube cutter, a. stationary frame, an endless member movably mounted within the frame, means for moving said member, means for supporting a core tube to be out, a. plurality of transverse members carried by said endless member, a pair of arms movably mounted on each of said transverse members and normally urged apart, and cam tracks located at opposite sides of the endless member and engageable by said transverse members for moving said arms toward each other, said arms carrying cutting blades.

2. In a core tube cutting machine, a supporting frame, means for supporting a tube to be cut, an endless member movably mounted within the frame, means for driving said endless member, a plurality of transverse members carried by said endless member, a pair of arms pivoted upon each of said transverse members, spring means normally urging said arms apart, and oppositely arranged. cam tracks engageable by said transverse members for swinging the arms toward each other into cut-ting relation to the core tube.

3. A core tube cutting device comprising a supporting structure, a member movably mounted therein, means for driving said member, cutters carried by said movable member. means for periodically bringing said cutters into engagement with the tube, the cutters being formed as disks carried by pivoted arms, and springs normally urging said arms apart.

4:. A core tube cutting device comprising a shaft for supporting the tube, a support, an endless member movably mounted within the support and means for driving the endless member, pairs of arms pivotally mounted upon said endless member and normally fill held apart, cutting disks carried by said arms and cam means engageable by the arms during movement of the endless member whereby to bring thedisks into engagement with said tube.

5. A core tube cutter comprising a driven shaft for supporting a tube, a supporting structure including a table member, having a longitudinal slot therein, shafts journaled in said supporting structure and carrying sprockets, means for driving one of said shafts, a chain trained aboutboth sprockets,

pairs of arms pivoted upon said chain and carrying rotatably mounted cutting disks, means normally holding said arms in spaced relation, said arms travelling along said slot, and means on the tableengageable by the arms whereby to force the disks thereon into engagement with the tube. a v

6. A core tube cutting machine comprising a driven shaft about which a tube is disposed a supporting structure including a table member having a longitudinal slot therein, shafts journaled in said supporting structure and carrying sprockets, means fordriving one of said shafts, a chain trained about both sprockets, pairs of arms pivoted upon said v the arms whereby to force the disks thereon into engagement with the tube, said means comprising inclined elements against which said arms engage.

p 7. In a core tube cutting apparatus, a driven supporting shaft for the tube, a supporting structure, a pair of shafts journaled in said supporting structure and carrying sprockets, a chain trained about said sprockets, a third shaft having a gear connection "with one of said pair of shafts, means for driving said third named shaft, arms ar-v ranged in pairs and pivoted upon said chain, springs normallyholding said arms apart, cutting disks rotatably mounted upon saidarms, and inclined Wedge members carried by the supporting structure and engageable by the outer edges of the arms whereby to force the disks into engagement with said tube to effect severing thereof.

In testimony whereof I aflix my signature.

CHESTER J. ROBERTS. 

